3Com 2900 manual Connecting the Power Cord, Connecting an AC Power Cord

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Figure 3-13Ground through an AC power PE wire

(1) Three-wire AC power input cable

(2) Switch rear panel

Use the PGND cable provided with the switch to connect the grounding strip in the equipment room. Otherwise, the grounding effect may not be ensured, which easily causes damage to the switch.

Connecting the Power Cord

Connecting an AC Power Cord

The 3Com Baseline Switch 2900 Family uses an external AC power system for its power supply. Follow these steps to connect an AC power cord:

Step1 Connect one end of the supplied PGND cable to the grounding screw on the rear panel of the chassis and the other end to the ground as near as possible.

Step2 Insert one end of the AC power cord to the AC power receptacle on the rear panel of the chassis, as shown in Figure 3-14.

Step3 Connect the other end of the power cord to a power source.

Step4 Check whether the power LED on the front panel of the switch is ON. If the LED is ON, it shows the power cord is properly connected.

Figure 3-14Connect the AC power cord

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Contents

3Com Baseline Switch 2900 Family Environmental Statement Organization About This ManualConventions Obtaining Documentation Related DocumentationManual Description Table of Contents Page Introduction Product OverviewPage Rear Panel 3Com Baseline Switch 2920-SFP PlusPower Supply System Front Panel3Com Baseline Switch 2928-SFP Plus 3Com Baseline Switch 2952-SFP Plus 3Com Baseline Switch 2928-PWR Plus 3Com Baseline Switch 2928-HPWR Plus 10/100/1000Base-T Ethernet Port SpecificationPorts Console PortMax Transmis Sion Distance Transceiver Central Connector Type1000Base-X SFP Interface FiberLEDs Power LEDRPS Status LED Port Ethernet port status Switch model Mode Meaning Port Mode LED10/100/1000Base-T Auto-Sensing Ethernet Port Status LED LED 1000Base-X SFP Interface Status LED Temperature/Humidity Installation PreparationsSafety Precautions Installation SiteGas Maximum concentration mg/m Laser SafetyElectromagnetic Susceptibility Dust concentration limit in the equipment roomInstallation Tools Introduction to Mounting Brackets Installing a SwitchModel Mounting bracket Description Attaching the Mounting Brackets to a Switch See -6 , Figure Model Mounting position DescriptionMounting the Switch to a Rack Page Connecting the Pgnd Cable Mounting the Switch on a Workbench When a Grounding Strip is Available Page Other Installation Sites Where a Grounding Conductor Can be BuriedWhen the switch is AC-powered Connecting an AC Power Cord Connecting the Power CordConnecting an RPS DC Power Cord Verifying the InstallationPage RJ-45 Signal Direction DB-9 Initial Power-OnSetting Up the Configuration Environment Connecting the Console CableConnection Procedure Setting Terminal Parameters4Set the serial port used by the HyperTerminal connection 6HyperTerminal window Checking Before Power-On Booting the SwitchPowering On the Switch Describes the fields above 2Description on the fields Enter 9. The system prompts you to change the startup mode Changing the Boot ModeEnter Y. The system displays the following information User interface aux0 is available Press Enter to get started Loading Files Through the Boot ROM Menu Approaches for Loading Application and Configuration FilesLoading Software Introduction to the Boot ROM Menu Loading a Boot ROM file Loading Files Using Xmodem Through Console PortIntroduction to Xmodem Change the rate of the serial port on the terminal Task RemarksDescription Page 2Properties dialog box 5Transfer menu Restoring the download rate to the default Page Introductin to Tftp Loading Files Using Tftp Through Ethernet PortLoad File Name Loading an application file Introduction to FTP Loading Files Using FTP Through Ethernet PortParameters are described in Table 5Description of the FTP parameters Loading an application file Boot ROM Password Loss Maintenance and TroubleshootingPassword Loss User Password LossWith both AC and RPS power supplies Power Supply FailureWith AC power input With RPS power inputTroubleshooting when there is no terminal display Configuration Terminal FailureTroubleshooting when the terminal display is illegible